Amazon advertising is one of the most powerful levers a seller has. It's also one of the fastest ways to burn through budget with nothing to show for it. After analyzing millions of dollars in Amazon ad spend, these are the five mistakes we see most often.
1. Running Broad Match on Every Keyword
Broad match is a trap. Amazon's algorithm is aggressive — it will match your ad to searches that have almost nothing to do with your product. A broad match campaign for "protein powder" might serve your ad for "protein dog treats."
The fix: Start every new campaign on exact match. Use broad match only once you have enough data to know which search terms actually convert — then add those as exact, and negative out the garbage.
2. No Negative Keywords
If you're not actively building your negative keyword list, your ACoS will creep up week over week. Amazon doesn't filter irrelevant traffic for you.
The fix: Pull your Search Term Report every week. Any term with clicks and zero sales after 15–20 clicks gets negated. Make this a ritual.
3. Bidding the Same on All Placements
Top-of-search placements convert at a completely different rate than product pages or rest-of-search. Treating them identically means you're either overpaying for low-converting placements or leaving top-of-search conversions on the table.
The fix: Use placement multipliers. Audit where your conversions are actually coming from in Campaign Manager, then adjust modifiers to match reality.
4. Ignoring Your Day-Parting Data
Amazon lets you see which hours and days your ads perform best — most sellers never look. You might be burning most of your daily budget between midnight and 6am when conversion rates are at their lowest.
The fix: Pull hourly data from your reports. Identify low-efficiency windows and either reduce bids or pause entirely during those periods.
5. Letting Campaigns Run Indefinitely Without Structure Reviews
Campaigns accumulate cruft. Old ad groups with dead products, keywords that haven't gotten a click in 90 days, bids that were set during a peak season and never touched again.
The fix: Schedule a quarterly PPC audit. Archive anything with zero clicks in 90 days. Consolidate underperforming ad groups. Treat your account structure like living code — it needs refactoring.
Managing PPC at scale is where most sellers hit a wall. RiverClaw's autonomous agent monitors your campaigns daily, flags inefficiencies, and surfaces actionable recommendations — so you're always a step ahead without spending hours in Campaign Manager.